About the book: 1993 / This book in the "Children's Detective" series includes two stories united by a marine theme. The main character of "The Mystery of the Red Tide" is Tommy Kelly loves to wander along the beach with her cousin Jill and collect sea life washed ashore by the tide. The adventures begin from the moment they meet strange people interested in exotic fish... And Tefi from “The Secret of the Seagulls” is tormented by the question of why Aunt Martha collects stuffed dead birds.